Don't worry about it; nobody starts out being an expert. I have a book at home with all the birds that can be found in my country (the Netherlands) but I absolutely haven't memorized that yet so I often grab it when I am in need of information. It's good fun to read about all these beautiful potential subjects for my photography though .

The second bird is a female, likely juvenile, black-crowned night heron.

The third bird is a green heron, sometimes called a green-backed heron. Small trivia for you: the neck on the green heron is at least as long as the night heron, but they can compact the neck into their feathers and body so it looks like they don't have a long neck at all. Wait until you see one lunge for a fish, and you'll see how long it really is!

Zackiedawg: It seems this one was just laying around, so I didn't catch him fishing, though for all I could see, it seemed it had no neck. Do all herons do this sort of compacting? I posted a shot of a different heron here some time ago and he had his neck compacted all the way as well.

Some herons compact their neck this way, but others do not. Great blue herons, little blue herons, and tricolor herons cannot compact their neck inside - they fold their neck down but you can clearly see that they still have a long neck. The night herons and green herons, as well as the least and American bitterns, can all compact their neck inside their feathers so they look like they have no necks.

Here's a green heron with his neck fully extended, just so you can see how long it really is: